For the new truly wireless buds, Sony built in a new noise-canceling chip called QN1e, which should not only be good at blocking out external noise, it should also do so while saving power - an important factor for small wireless earbuds. The buds use Dual Noise Sensor technology, so there are two microphones capturing sound so that the chip can cancel it out.
Aside from that, Sony is also promising great audio quality with a 24-bit audio signal processor and digital-to-analog converter (DAC). They also use Digital Sound Enhancement Engine HX (DSEE HX) to upscale compressed digital audio files, such as MP3, so you should get quality closer to that of high-resolution audio.
As you'd expect, the buds use Bluetooth 5.0 to communicate with your devices, and Sony says there's a new chip inside, so both of the buds sync with your phone, rather than having one of them sync and relay the data to the other one. Sony also says the antenna design was improved so there are no interruptions while listening. The WF-1000XM3 still support customizable touch controls, including the ability to temporarily disable noise cancelation by holding down on the left-side bud.
Finally, as far as battery life goes, the buds alone should last six hours on a charge, with the case being able to hold up to three additional charges. If you disable noise canceling, you should get eight hours per charge. Charging is also relatively quick, with 10 minutes of charging time adding 90 minutes of listening time.
The WF-1000XM3 will be available in mid-August and cost around €250/£220/$230. You can already pre-order them on Amazon in Europe. In America, Sony's website should give you a list of retailers to buy them based on your location.